Telos Zephyr Xstream User Manual page 299

Try a call to another local number. Have the far end try this test as well.
Try calling yourself, both using both "call type – Zephyr" and "call type – phone".
Your line may be configured for only voice (CSV) or only data (CSD).
If you cannot complete this call try dialing with a 9, 8, 7, or 6 before the number.
Sometimes ISDN lines are set up as Centrex service even if you did not request this.
Note the Cause Code or Words displayed when the Zephyr Xstream releases the
line. See Appendix 3.
Is your long‐distance carrier OK?
If you can successfully call locally, but long‐distance calls don't go through, the
Zephyr Xstream usually displays Far end disconnect, or No route available as the
ISDN "Cause" phrase.
You may try a different by dialing the appropriate 10XXXXX prefix (in the USA &
Canada only). Some codes we have found that are worth trying are:
1010222 (MCI)
1010288 (AT&T)
1010333 (Sprint)
You will dial as follows (dial prefix, if required) + 10xxxxx + 1 + area code + 7 digit
phone number.
In the USA, you can determine who your long distance carrier is by dialing
1+700+555+4141 using the PHONE call type. If Intra‐LATA long distance
competition has reached your area you can determine your Intra‐LATA long distance
carrier by dialing 1+area code+700+4141.
What does the ISDN "Cause" phrase say?
This phrase, which will appears on the ISDN status screen whenever the line is
released, comes directly from the telephone company equipment, and can be
valuable for troubleshooting. Generally, these phrases are self‐explanatory. Getting
them means you are at least talking to the Central Office equipment. There is a full
description of the phrases and their meaning in Appendix 3.
Condition: Intermittent ISDN Problems
These are among the most difficult kinds of problems to solve. Rest assured, however, that we
have yet to lose one!
Does the problem occur on all of the ISDN BRI circuits or just a single BRI circuit?
If your Zephyr Xstream works fine on another circuit, then it is unlikely it is the cause
of your troubles. Tell the Telco this, and give them the phone numbers for the good
line.
If the problem is limited to a single BRI circuit (i.e. both "lines" on that BRI are
showing the problem) then the problem is probably with that BRI circuit.
Section 13: Deep Tech Information and Troubleshooting
USER'S MANUAL
287